Kicker 1000 Watt Mono Auto Sub Amp w/Subsonic Filter And Bass Boost Fully Featured in an Ultra-Compact Footprint High-Efficiency Full-Range Class-D Design Automatic turn-on options include - 12 volt remote turn-on, DC offset, and audio signal sensing Differential Hi- and Lo-Level Inputs for integration in any system Advanced protection circuitry - low/high voltage, over-current, and thermal protection with indication on end panel